I did not know how to interpret these two indications and I also had no idea whether the batteries at these bays were draining or charging or neither

I bought this unit for the capability to charge more than 4 rechargeable batteries at a time, and the refresh option.

These batteries are such a disappointment....used once and will not charge!!!

Keep in mind that the batteries did get pretty warm while charging.

Once fully charged, batteries weak and died fast.

I try to refresh my old recharge battery, but it show "error" message

Any battery that has developed higher internal resistance from age/use is almost certainly going to error out

Seems they will not charge completely dead batteries

The Tenergy Charger apparently has a rather strict algorithm to decide if it wants to charge the battery or it's possibly a bad battery

I had some questions regarding the charger and batteries after they arrived and the service I received directly from Tenergy was knowledgeable and fast in arriving

With a paper clip connect the + terminal of good battery and bad battery

Or is the charger over charging, under charging, or otherwise ruining good batteries?

True that some batteries Are displaying 'error' when charging or just displays an outline of a battery, & I know the battery's good

*do not* inform the user how defective batteries are indicated.(yes, it does say 'error' _if_ there is a defective battery, but this information should be included ion the printed instructions

They started charging than unit claimed batteries bad

It doesn't charge failed batteries and charges good batteries quickly

Triple A batteries struggle to charge on this charger for lack of connection from design

The batteries are great, but the charger, not so much

I've used this once or twice to refresh batteries and bring the capacity back up

I store my solar lights over winter so the batteries are drained when stored

A quick test with an infrared thermometer revealed 113 degrees on the hottest battery at the first position

It also rejected bad batteries by not showing them as charging.

The only beef the outer right battery

This should give the bad battery a boost and it will start charging

The construction of this charger is nice and it seems to charge some batteries well

Approx a year old, All CORRECT chemistry batteries used per manual instructions

We were using one of these at a battery dropoff/charging station at our company and some folks who weren't paying attention and trying to do a good thing placed their depleted alkaline batteries into the Tenergy charger.

, it's very picky, could not charge a lot of good brand battery like Energizer and Sanyo, but not all of them, some it still could, but before I figure out why, it just give up charge and with a blank blue screen now.

If your battery is discharged and charger refuses to charge it try this: Put it in the charger next to a good battery

This should give the bad battery a boost and it will start charging

Works perfectly, have been using this for a while and it has kept all my batteries nice and healthy. :-)

Smartest battery charger I ever owned

Lastly, some new batteries failed to charge or don't hold charge

It doesn't charge failed batteries and charges good batteries quickly

At first, I though that there was a dead slot in this charger, but after moving the battery around, I finally concluded that the battery was bad

Yet these "empty" batteries work fine in use, and charge fine in "dumb" chargers

True that some batteries Are displaying 'error' when charging or just displays an outline of a battery, & I know the battery's good

Bottom line: this thing works as advertised, charges each battery independently, and keeps each cell on a trickle charge compatible with the requirements of NiMH batteries (no trivial accomplishment.

At the very least, this will damage the batteries

Or is the charger over charging, under charging, or otherwise ruining good batteries?

So easy to read and know which battery is bad and which ones took a full charge

There are times when the human factor is just as important as the technical specifications and this is one battery charger that misses the human factor requirement.

With a paper clip connect the + terminal of good battery and bad battery

I tested Energizer NIMH batteries work into Tenergy TN160 LCD Battery Charger that work.

The only thing that I do not like is that the batteries get VERY hot when charging 12 AA's - especially at the first few positions

This will allow better battery management and pairing.

I also purchased Tenergy rechargeable batteries but this also works with other brands of rechargeable batteries

Sometimes apparently "dead" batteries can be forced to recharged by first recharging in a standard 4-slot charger

After much research, I narrowed my selection down to this product and the  16 Slot Titanium AAAAA Fast Battery Charger with LCD Display .

The blue lights are bright but cool looking as mentioned and the batteries get a little warm but not hot

other BRAND NAME RECHARGEABLE batteries --not so well with the Tenergy AA Batteries I bought at the same tme -- will stick to batteries that I've heard of with this charger for now anyway!

It also has no vacuum attachment to automatically recycle a dead-for-good battery

I know the batteries were good since I had them in another of my chargers.

Works great for recharging my batteries for my game cameras

does this mean the batteries are no good?

This is, by far, the most awesome battery charger I ever purchased

The resulting charge is a level that equates to a dead battery.

I can take fresh batteries as needed, charge the dead ones AND STILL HAVE FRESH BATTERIES

I have learned through experience that fast charging kills batteries

Not only does it charge, it discharges and maintains as well as refreshes your batteries

After charging the same brand batteries for the 3rd time after completely drained batteries each time... only getting a 72% charge... either the batteries are not so great, or the charger?!?!

I had some "questionable" batteries that weren't holding much of a charge, so I thought I'd give them a refresh here.

With batteries loosing 1% to 3% of their charge daily the trickle charge feature comes on when needed so you can leave them in the charger and have a max power every time

I use chargers a lot because I HATE disposable batteries

Haven't had to use the refresh function yet (started with fresh batteries) but that's a great option for bringing life back to older cells.

Though, I do prefer the Tenergy brand batteries, too.

this charger is a great value at about $30 (with shipping)displays each batteries progress and can discharge the battery as well, just be sure not to run the battery to low or the charger dosent see it rite

Well, the batteries and charger have been in service for over 3 years now (used 6-7 months/year).

But this is great for its purpose, which is getting a bunch of batteries ready for the next shoot.

I like you can charge 1-12 batteries, see individual charge rates, and van fully doscharge batteries to reconditipn them.

After charging the same brand batteries for the 3rd time after completely drained batteries each time... only getting a 72% charge... either the batteries are not so great, or the charger?!?!

Like, if you leave this in a room charging some batteries and go outside at night, people will walk by and wonder why you have a blue room

500 seems to be the generally accepted optimal charge rate for AA.If you need to refresh batteries, manually select charge rate, or do anything more complex than auto-charging, I'd suggest one of the 4-bay LaCrosse chargers.

Charges batteries well.

Been happy with the batteries of this brand and this charger works as it should

Works exactly as it is intended to